#171B7D#171B7D

#171B7D is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.5% C 0.159 H 270.4°. Best body text is #FFFFFF at 14.10:1 contrast (WCAG AA passes).

Color values

HEX	#171B7D
RGB	rgb(23, 27, 125)
HSL	hsl(238, 69%, 29%)
HSV	hsv(238, 82%, 49%)
CMYK	cmyk(81.6%, 78.4%, 0%, 51%)
CIE-LAB	lab(17.67, 35.01, -54.94)
CIE-LCH	lch(17.67, 65.14, 302.51°)
OKLab	oklab(30.51% 0.0012 -0.1591)
OKLCH	oklch(30.51% 0.159 270.4)
XYZ	xyz(4.4457, 2.4462, 19.6359)
Luminance	0.0245 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B7D #7D7917

analogous

#174E7D #171B7D #46177D

triadic

#171B7D #7D171B #1B7D17

tetradic

#171B7D #7D174E #7D7917 #177D46

square

#171B7D #7D174E #7D7917 #177D46

split-complementary

#171B7D #7D4617 #4E7D17

monochromatic

#05061A #0D1049 #171B7D #2126B1 #353BDA

Accessibility & contrast

On white

14.10

#171B7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#171B7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B7D

14.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B7D	#FFFFFF	#000000	##FFFFFF
##171B7D	1.00	14.10	1.49	14.10
#FFFFFF	14.10	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003080

Deuteranopia (green-blind)

#00267B

Tritanopia (blue-blind)

#00384B

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171b7d;
/* rgb */ color: rgb(23, 27, 125);
/* oklch */ color: oklch(30.5% 0.159 270.4);

Tailwind

colors: {
  custom: {
    50: '#6959a4',
    500: '#171b7d',
    950: '#000000',
  },
}

SCSS

$custom: #171b7d;
$custom-light: #6959a4;
$custom-dark: #000000;

JSON

{
  "hex": "#171b7d",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 125
  },
  "hsl": {
    "h": 237.647,
    "s": 68.919,
    "l": 29.02
  },
  "oklch": {
    "l": 0.30512,
    "c": 0.15911,
    "h": 270.4
  },
  "luminance": 0.02447
}

Semantic roles & 50–950 ramp

primary

#171B7D

secondary

#B2AD3E

accent

#E53CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171B7D

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →